Composition of matter and method of producing the same.



SAMUEL M. DARLING, OF CHICAGO, ILLINOIS.

COMPOSITION OF MATTER- .AND METHODOF PRODUCING THE SAME.

LII L500.

No Drawing.

Specification of Letters Patent.

' latentcd Oct. 20, 1914.

Application filed September 30, 1912. Serial No. 723,017.

To all whom it may concern:

Be it known that I, SAMUEL M. DARLING, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Composition of Matter and Method of Producing the Same, of which the following is a specification.

My invention relates to a new and useful composition of matter adapted for use as a leather preservative, and a method for producing the same. p

The composition of matter referred to is produced as a by-product of lignite and is found to contain creosote and anthracene,

both highly preservative of leather.

The composition is produced by first distilling to dryness the oil or tar procured in the destructive distillation of lignite. The fraction which comes over above 350 Fah. is redistilled to a point at which the residue has the desired consistency and waxiness. In this rcdistillation' a measure of polymeri- 'zation of the hydro-carbon molecules is efi'ccted which gives the residue a much firmer body than it originally possessed! I may prefer to blow oxygen through the mass during distillation and I may also add formaldehyde to the oil to be redistilled.

I may also during redistillation add .an oxidizing oil such as linseed oil, in which case it is necessary to pass oxygen through the mass. The product thus obtained is light in color, not black as are the bitumens.

- The product can be used not only with sole,

belt, harness and other rough leathers but on the finest of leathers such as book bindings. This product may be added if de sired after the books have been bound. The product is waxy in consistency although it may be produced of any desired consistency.

This composition of matter is intended for use as a preservative of leather, the creosote and anthracene content acting in that capacity in cooperation with the other constituents. The different constituents counteract the effect of surplus tanningacids remaining in the leather and in addition overcome the general tendency of the leather to putrefaction. The addition of this composition gives the leather more body and weight and renders it pliable and more wear resisting.

It also renders it waterproof and more resistant to surface slipping. In practice the composition is drummed into the leather at a temperature'from 130 Fah. to 200, in

the well known manner and takes the place of the usual fats, oilsor tallow.

I claim:

1. The method of producing leather preservative, which consists in distilling to dryness the oil 'or tar procured in the destructive distillation of lignite, then distilling the fraction which. comes over above 350 Fah., to a point at which the residue has a waxy consistency, substantially as described.

2. The method of producing leather preservative, which consists in distilling to dryness the oil or tar procured in the destructive distillation of lignite, then distilling the fraction which comes over above 350 Faln, to a point at which the residue has a waxy consistency, and blowing a. quantity of oxygen through the boiling mass during redistillation, substantially as described.

3. The method of producing leather preservative, which consists in distilling to dryness the oil or tar produced in the destructive distillation of lignite, then distilling the fraction which comes over above 350 Fah., to a'point at which the residue has a 'waxy consistency, and blowing a quantity of oxygen through the boiling mass during. redistillation and then adding an oxidizing oil, substantially as described.

4. A new composition of matter composed of the oil or tar of lignite distilled and redistilled to a waxy consistency, and a preservative, substantially as described.

5. A new composition of matter composed of the oil or tar of lignite distilled and re-v I distilled to a waxy consistency, and an oxidizing oil, substantially as described.

6. A new composition of matter'composed of the oil or tar of lignite distilled and re distilled to a waxy .consistency, formaldehyde, and an oxidizing oil, substantially as described.

I SAMUEL M. DARLING.

Witnesses:

T. D. Bums,

Ones. I MURRAY. 

